Patents by Inventor Charles F. Kulpa, Jr.

Charles F. Kulpa, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Biometallurgical treatment of precious metal ores having refractory carbon content
    Patent number: 5244493
    Abstract: A method is provided for the recovery of precious metal values, such as gold and silver, from refractory carbonaceous, or carbonaceous-sulfidic ore material. The ore material is inoculated using a specific microbial consortium and then incubated to deactivate the carbonaceous component of the material to prevent binding of the precious metal values to the carbonaceous component. The precious metal is then recovered.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: September 14, 1993
    Assignees: Newmont Gold Co., Newmont Mining Corporation
    Inventors: James A. Brierley, Charles F. Kulpa, Jr.